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13=4.3+c
We move all terms to the left:
13-(4.3+c)=0
We add all the numbers together, and all the variables
-(c+4.3)+13=0
We get rid of parentheses
-c-4.3+13=0
We add all the numbers together, and all the variables
-1c+8.7=0
We move all terms containing c to the left, all other terms to the right
-c=-8.7
c=-8.7/-1
c=8+0.7/1
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